Body of Evidence

All the high-tech gadgets and tests won't matter a bit if evidence isn't meticulously gathered at the scene of a crime. It's the little things that count-a stray hair, a piece of lint, a smudge of mud. This trail of tiny crumbs could ultimately lead straight to the killer

Clues at the scene

FINGERPRINTS Most prints, set down by oils and sweat on the surface of fingers and hands, are not easy to spot. But investigators have a hefty bag of tricks to expose them-powder, chemicals, lasers and lights. Or even plain old superglue. Prints that are invisible on things like...